Every foam mattress, of every design, will eventually wear out and need to be replaced. I estimate that our DIY polyurethane and latex foam bed will last 10-15 years if individual foam layers are turned (flipped) every 5 years or so. But, the new all foam mattresses like the Casper and Leesa that are completely encased in non-removable covers, and therefore can't be turned, might last only 5-10 years before sagging in the foam makes them uncomfortable. So ...
What To Do With Your Old Mattress?
The best solution is to contact a recycling facility in your area. This keeps the material out of the landfill and puts the old material to good use. ByeByeMattress has a recycling facility locator to help. Just enter your zip code and contact the facilities near you for their details.Then, find a friend with a pickup to help you haul the mattress to the recycling facility!